/*
 * Copyright (c) 2014 Citrix Systems, Inc.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#if !defined(CIRCLE_H)
#define CIRCLE_H

class Circle
{
public:
                    Circle();
                    ~Circle();
    bool            Initialize(int size);
    int             Insert(char * data, int len);
    int             Retrieve(char *, int len);
    int             QueryRetrievable();
    int             QueryInsertable();
    void            WaitUntilNotFull();
    int             QueryContiguousRetrievable(char ** datap);
    int             CommitRetrieved(int len);
    void            Drain();
    void            TestPattern(HANDLE);
    
private:
    char          * buffer;
    volatile int    in;
    volatile int    out;
    int             length;
    HANDLE          waitEvent;
    volatile LONG   waitCount;
};

#endif
